﻿<p><u>Definition from IAI</u>: The function returns
true, if
the set of <i>Units</i> within an <i>IfcUnitAssignment</i>
only include units with different <i>UnitType</i>'s (for <i>IfcNamedUnit</i>
and <i>IfcDerivedUnit</i>), and a maximum of one <i>IfcMonetaryUnit</i>.</p>
<p>Argument definitions:<br>
Units : (input) the set of <i>IfcUnit</i>'s.
</p>